Improvement in yarn-testers



Jg R. BROWN. YARN TESTER.`

.Patented Nov. ze, 1876.

INVENTDH.

NPETERS, PMOTO-LITHOGRAPMER, WASHINGTON. D. c.

1 NrTED STATES JOSEPH R. BROWN, OF PROVIDENCE, RHODE ISLAN IMPROVAEMENT IN VARN-TESTERS.

Specification forming part of Letters Patent No. 184,830, dated November 28, 1876; application filedl July 17, i876. y

To all whom it may concern:

Beit known that I, JOSEPH R, BROWN, of the city and county of Providence, State of Rhode Island, have invented new and useful Improvements in Yarn-Testers; and I hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification.

Figure 1 is a perspective view of my improved yarn-tester, the lower part being shown as broken, to bring the whole withinthe limits of the sheet. Fig. 2 is a longitudinal section through the center of the machine, and shows all the working parts, partly in view and partly in section.

The object of this invention is to produce a convenient, simple, and durable machine or instrument, by which both the strength andV stretch of yarns may be accurately tested, to

enable the manufacturer to know constantly and with exactness the quality andA strength of the yarn produced.

The nature of the invention consists in the peculiar arrangement ofl a coiled spring with a graduated index-plate and means for secur ing skeins of yarns and subjecting them to strain, so that the amount of stretch, and also the breaking-strength, of yarn, will be indicated, as will be more fully set forth hereinafter.

The improved yarn-tester shown in the drawings is arranged to be permanently fixed in a vertical position, the foot a resting on the floor and secured to the same, while the brack-f ets b b are secured to the wall, so that the instrument projects sufficiently from the wall to allow the crank o to be readily operated. The pin d is fixed to the lower extension of the case c, near the foot a, and the pin c is fixed in an extension ofthe cross-head f. When the instrument is in the normal condition, ready to receive the yarn to be tested, the pins d and e are somewhat nearer together than the length of the loop, the object being to facilitate the adjusting of the loop on the pins. Secured to the cross-head f is a coiled spring, g, of an ascertained fixed tension, which spring extends upward and is secured to the cross-head h. To the lower cross-head f the graduated index 'i is permanently secured, the lower part being graduated to indicate the stretch ofthe yarn and the upper part to indicate the breaking-strain of the same. be made to represent inches and fractions of inches, and the upper part pounds avoirdu-l pois and fractions of the same; or any other measures of weight and length may be so indicated on the index-plate. The index-plate i moves with the cross-head f past the pointer l k, the zero-point being reached assoon as the pins d and c are the necessary distance apart to bring the loop of yarn to a `lirm bearing without strain or stretch, so that all theA yarn is placed on the pins d e, and a strain is exerted on the cross-headh, then the cross head h, the spring g, and the cross-head f will slide upward in the case cuntil the zero-mark on the index-plate is opposite the pointer k.

The yarn is now in that condition when any v further strain on the cross-head1 will exert bothstrain and stretch on the yarn. The

stretch of the yarn will allow the pins d andV c to separate further, and thus allow the crosshead f to slide upward, and with it the indexplate, past the pointer k, while the strain exerted overcomes the tension of the springg, and allows the cross-heads f and h to separate; and as the pointer l is secured to the cross-head IL, and the index-platea to the crosshead f, the distance of this separation will he indicated by the pointerslidin g upward on the index-plate until the yarn breaks, thus indieating both the amount of stretch and the breaking-strength of the yarn.

The moment, however, the yarn breaks the spring g will draw the'crosslheads f and h together, and it would be difficult to ascertain the exact amount of stretch or strain yexerted at the moment the yarn broke.

The lower part may The object therefore of the other lparts in this inven tionis to retain the positions of the crossheads, index-plate, and pointer at the point reached at the moment of the breaking of the yarn, so that both the stretch and strain can be conveniently ascertained, and tlie instrument wound back to its normal point to be ready for another test.

The strain on the cross-head h is` exerted by the hollow spindle m, secured in a firm bearing between shoulders 'n at the upper end of the case c.' 'Ifo-this spindle mthe crank o is secured, by which it may be turned. y

The spindle m is provided on its outer surface with a screw-thread, which enters a nut' or female screwin the cross-head h, and as the spindleis firmly held at n by turning the same with the crank o the crosshead h is moved either up or down.

At the lower end of the hollow spindle m a nut or female screw is secured in the tubu larpart of the spindle, in which the screwspindle p turns. The lower part of the screwspindle p passes through the cross-headf, and is provided at its lower endwth the clutch q, and also within the cross-head f with `the clutch r.

s is a stop-pin, by which the clutch q can be stopped to prevent its rotation,and t is astoppin, which, when it enters the hole in the ex tension of the cross-head f, indicates that the pin `e is at the proper positionto receive the Yarn to be tested.

When we now with a yarn-reel wind from a cop or bobbin one knotor oneseventh of a hank or skein, or any other portion for which the yarn-tester has been adapted,`carefully remove the yarn from the reel and place it upon the pins d and e, and turn the crank o to thel right until the yarn breaks. The amount of stretch and also the strainvor the exact breaking-weight will be shown on the index-plate, and all parts will retain the exact position occupied when the yarn broke, the screw-spindle m retalnlng the crosshead `h in the position when the yarn broke,and the spindle p holding the cross-heads h and f the exact distance apart at which the yarn broke.

As the hollow spindle lm, when turned to the i right enters the nut inthe cross-head h, a strain is put on the spring g, and the spindle p revolves with the spindle m until the clutch q engages and holds the spindle p stationary, when the turning of the spindle mallows the tubular part of the spindle m. y

When,now, the yarn stretches, the crosshead f slides upward, the clutchq revolves until the strain is sufficient to engage the same,

and so on until all the stretchis taken out of 1 lit stops, when the stop-pins s and t are released, and the instrument is in condition to receive another skein or knot of yarn to be tested.

In adjusting the instrument it should be uuderstood thatwhen the stop-pint enters the hole opposite the pin e the said pin is in the lowest position, or at the point to receive the yarn, and that at that point the pointer 7c, indicating the amount of stretch, is above the zero mark on the index-plate, which mark will be opposite the pointer as soon as the skein or knot is properly straightened, and before stretch takes place. This part, therefore,re `quires no adjustment.

When, however, `the instrument `has been used` without` yarn and becomes i deranged, it

may be readily adjusted by turningthe thumb-,p l screw `fu, above the crank,ywhich thumb-screw .l

is secured' to a tube, w, provided with a square hole at its lower end, in which the square rod .y secured to the spindle p, slides, so that by u t, turning the thumb-screw` u the spindle p may be turned, and the distance between the crossheads h and f adjusted. While in operation the square rod fv slides freely in the tubew.

flhe tube a: also serves as a lubricating device."M The oil poured into the same will enter the tubular portion of screw-spindle m, and, byya1 holeat yenters an oil-cup arranged on` the ,l Ecross-head' h, and so lubricatesthe exterior :and interior of the spindles and` all the work-` ing parts.

All the operating parts in my improved yarn-tester are containedwithin the caseO, `and are thus protected against dust andin-` jury. The instrument occupies but little room,`

4iis simple in construction, durable, and can be imade at a less cost than yarn-testers as heretofore constructed.

jentd, arranged and operated substantially as and `for the purpose described...

cross-heads h and f, counectedby the spiral ,spring g with the index-plate,arranged` to Viindicate the length ofythe` stretch andthe gbreakingstrength of the yarn, both or either 1=a-s and for the purposespecied. y screwof the spindle p to enter thenut in the l the purpose set forth..` l y. ,i 4. The combination, with theheadslh and f Having thus descrlbed` my invention, I claim` ias new and desire to secureby Letters Pat-` I 1. l In a yarn-testinginstrument, the combi; jnation, `with the adjustable cross-head h, of the 1. spring g and cross-head fand the pins e andv 2. The combination, 1n a yarn-tester, of the" 5 3. In a yarn-tester,jthe.combinationpwith` fthe heads h and fand spring g, of thescrewspindle m and crank o, arranged to increase lthe `strainon the yarn gradually, as land for the yarn and the yarn breaks.

To place the parts of the instrument in position for another test, the crank o is turned to the left until the pine is at its lowest point, the stop-pins s and tare pressed in, andthe crank is gently turned to the right until I and spring g.. in a yarn-,testinginstrument, of the tubular screw-spindle mand screw-spindle 3p, arranged torete-in all` the? parts `in the po-` sition occupied when the yarn` broke, :as and.

for the `purpose described. y i,

5. In a yarn-testing instrument, the combination, with a stationary pin and a sliding pin arranged to receive the yarn to be tested, of the spiral spring g, secured to the sliding pin at one end, and to a straining device on the other, operated by means of a screw, and prov vided with an index or indexes, so as to show the amount of stretch and the breaking-strength of the yarn, arranged and operated substantially as and for the purpose set forth.

6. The combination, with the vertically-arranged cas'e c, provided with the extension supporting the pin d, of the pin e, secured to the cross-head h, and means, substantially as v 

